How to Calculate Top of Descent

This method always undershoots. That’s ok for intercepting the glideslope/localizer though.

Nothing wrong with undershooting since the whole point is to get to the intercept in time.

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I fully agree^^ Just nitpicking your original post haha. I use the same technique but I put the margin in the other direction. I.e rounding 12.3 down instead of up.

But overall this technique is definitely the most practical for IF. A lot of people get tripped up with IAS/TAS/GS while using other methods.

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Definitely. This post tries to eliminate confusing variables. Glad you like it :)

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